Natarajan, Inc. had the following operating segments, which indicated amounts of segment revenues and segment expenses:

External Revenue Intersegment sales Segment Expenses

A $7,500,000 $ 600,000 $ 6,300,000

B 2,900,000 1,000,000 4,300,000

C 700,000 1,300,000 2,200,000

D 4,000,000 250,000 4,100,000

E 1,600,000 800,000 2,700,000

When totaling the revenue to use as the basis for the 75% rule, what is the 75% hurdle that must be exceeded by the revenue of the reportable segments?